Commit d759c951f changed the main thread lock release/reacquisition, and in so doing apparently jostled loose a race condition in the AHCI code.
Patch 2 should be sufficient to fix this, and patches 1 and 3 are just little trivial fixes. This might be sufficient to fix the bug as reported at https://bugs.launchpad.net/qemu/+bug/1769189 but the nature of the timing changes make it difficult to confirm, so I am posting this patchset for the reporters to help test. John Snow (3): ahci: trim signatures on raise/lower ahci: fix PxCI register race ahci: don't schedule unnecessary BH hw/ide/ahci.c | 24 +++++++++++------------- 1 file changed, 11 insertions(+), 13 deletions(-) -- 2.14.3
